Flash Flood Warning 30, NWS Kansas City, MO

322 
WGUS73 KEAX 212146
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
446 PM CDT MON AUG 21 2017

KSC209-MOC025-047-049-165-177-220045-
/O.CON.KEAX.FF.W.0030.000000T0000Z-170822T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wyandotte KS-Clay MO-Clinton MO-Ray MO-Caldwell MO-Platte MO-
446 PM CDT MON AUG 21 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
WYANDOTTE...CLAY...SOUTHEASTERN CLINTON...RAY...SOUTHERN CALDWELL AND
SOUTHEASTERN PLATTE COUNTIES...

At 444 PM CDT, local news media showed extensive flash flooding over 
the northern Kansas City Metro. Up to three inches of rain has 
fallen this afternoon and additional heavy rain is expected this 
evening. Dangerous flash flooding is already occurring. 

Some locations that will experience flooding include...
Shawnee, Liberty, Gladstone, Lansing, Excelsior Springs, Smithville,
Kearney, Bonner Springs, Richmond, Parkville, Lexington,
Edwardsville, North Kansas City, Sugar Creek, Riverside, Lawson,
Weatherby Lake, Westwood, Claycomo and Kansas City Kansas.

This includes the following highways...
 Interstate 70 in Missouri near mile marker 0.
 Interstate 70 in Kansas between mile markers 410 and 423.
 Interstate 35 in Missouri near mile marker 0, and between mile
markers 5 and 38.
 Interstate 35 in Kansas between mile markers 232 and 235.
 Interstate 29 between mile markers 0 and 16.
 Interstate 635 between mile markers 1 and 12.
 Interstate 435 between mile markers 9 and 56.
 Kansas Turnpike between mile markers 223 and 226.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 3920 9490 3921 9478 3929 9488 3974 9376
      3921 9376 3921 9385 3915 9399 3916 9399
      3921 9398 3913 9409 3918 9419 3921 9417
      3924 9429 3912 9445 3915 9452 3911 9460
      3904 9461 3906 9487 3899 9491 3900 9491

$$

32

112 
WGUS73 KEAX 220038
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
738 PM CDT MON AUG 21 2017

KSC209-MOC025-047-049-165-177-220047-
/O.EXP.KEAX.FF.W.0030.000000T0000Z-170822T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wyandotte KS-Clay MO-Clinton MO-Ray MO-Caldwell MO-Platte MO-
738 PM CDT MON AUG 21 2017

...THE FLASH FLOOD WARNING FOR WYANDOTTE...CLAY...SOUTHEASTERN
CLINTON...RAY...SOUTHERN CALDWELL AND SOUTHEASTERN PLATTE COUNTIES
WILL EXPIRE AT 745 PM CDT...

The heavy rain has ended. Flood waters have receded. Flooding is no 
longer expected to pose a threat in the immediate future. However 
additional rainfall may move into the area later this evening or 
overnight and additional warnings may be needed as a result. Please 
continue to heed any remaining road closures.

LAT...LON 3920 9490 3921 9478 3929 9488 3974 9376
      3921 9376 3921 9385 3915 9399 3916 9399
      3921 9398 3913 9409 3918 9419 3921 9417
      3924 9429 3912 9445 3915 9452 3911 9460
      3904 9461 3906 9487 3899 9491 3900 9491

$$

CDB

AREA FORECAST DISCUSSION
National Weather Service Kansas City/Pleasant Hill MO
339 PM CDT Mon Aug 21 2017

.Discussion...
Issued at 340 PM CDT MON AUG 21 2017

Main concerns in the near term remain focused on heavy rain and
possible flash flooding as a very moist atmosphere remains in
place. Main focus for convection this afternoon looks to be a
remnant convergent line/outflow boundary now stretching from
central Missouri west into northeastern Kansas. Storms have
been developing along this feature this afternoon with primary
impacts felt across the northern Metro so far. Convection
allowing models indicate this activity will start sliding east in
a couple of hours with attention then shifting to our north where
a cold front is set to arrive later tonight. All available
guidance shows this boundary lighting up with convection later
this evening with activity slowly settling south during the
overnight and early morning hours. Overall concerns earlier today
for flash flooding seem a bit suppressed due to faster system
movement as seen on today's model runs, however convection
currently impacting the northern Metro and precip from earlier
today has undoubtedly further primed soils for possible flash
flooding later tonight. As a result, no planned changes to the
flash flood watch with this afternoon's fcst package. With PWAT
values anywhere between 2-3 standard deviations above normal,
along with a southwesterly directed low-level jet overnight and
decent upper divergence in the right entrance region of an upper
jetstreak to our north, the atmosphere appears more than set for
heavy rain production. The only caveat that remains to be seen is
whether the faster system movement leads to less residence time
over primed basins, and thus lower precip totals than previously
forecast. Lets hope this is the case but current radar trends and
recent reports across the north side of the Metro offer
decreasing hope to this scenario and as a result, it could very
well be a busy night across the area. If there's one bit of good
news is that ongoing precip and convective overturning from
earlier convection has helped to stabilize the environment to some
degree. While a few stray severe storms cannot be ruled out, the
overall threat this evening and overnight will be focused on hydro
concerns.

Precip to quickly come to an end late Tuesday morning and
afternoon from north to south. Cool high pressure will quickly
build into the region during the afternoon tomorrow with dry
conditions persisting right through mid/late week. Unseasonably
cool air will filter into our region with high temps from
Wednesday through Friday struggling to reach the 80 degree mark.
High pressure across the Great Lakes and a southwestward extending
surface ridge axis look to keep our region dry through late week
before rain chances reappear as we head into the weekend.

&&

.Aviation...(For the 18Z TAFS through 18Z Tuesday Afternoon)
Issued at 1239 PM CDT MON AUG 21 2017

Challenging fcst in the near term as latest radar trends continue
to show light precipitation over the area. Most likely impacts in
the near term are expected at STJ and MCI where light shwr
activity will be possible through 21z. Otherwise, attention will
then shift towards the late evening when fcst models show the best
chance for organized shwr/storm activity as a cold front slides
south over the region. As this occurs, expect widespread
shwr/storm coverage with all sites having the opportunity to fall
below MVFR and IFR thresholds. Considering the uncertainty of
timing this afternoon, with allow later updates the opportunity to
address expected restrictions once trends become better
established.

&&

.EAX WATCHES/WARNINGS/ADVISORIES...
KS...Flash Flood Watch from 10 PM CDT this evening through Tuesday
     morning for KSZ025-057-060-102>105.

MO...Flash Flood Watch from 10 PM CDT this evening through Tuesday
     morning for MOZ012>016-020>024-028>032-037>039-043>045-053-
     054.

&&

Discussion...32
Aviation...32

Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
315 AM CDT Mon Aug 21 2017

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-220815-
Atchison KS-Miami-Linn KS-Doniphan-Leavenworth-Wyandotte-Johnson KS-
Atchison MO-Nodaway-Worth-Gentry-Harrison-Mercer-Putnam-Schuyler-
Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-Adair-Buchanan-Clinton-
Caldwell-Livingston-Linn MO-Macon-Platte-Clay-Ray-Carroll-Chariton-
Randolph-Jackson-Lafayette-Saline-Howard-Cass-Johnson MO-Pettis-
Cooper-Bates-Henry-
315 AM CDT Mon Aug 21 2017

This hazardous weather outlook is for northwest...north central and
west central Missouri...as well as extreme eastern Kansas.

.DAY ONE...Today and Tonight

 Multiple rounds of thunderstorms are possible this afternoon and
 this evening, some which could become strong to severe. Strong
 winds, hail and perhaps even an isolated tornado are possible with
 the afternoon round especially along and north of Highway 36, and
 strong winds are possible with the late evening-overnight round
 throughout the outlook area.

 In addition to the severe threat, flooding will be a concern this
 evening and tonight throughout the outlook area. Several inches of
 rain are possible, and may fall very rapidly in stronger storms.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

 No hazardous weather is expected at this time.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
333 PM CDT MON AUG 21 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0312 PM     FLOOD            KEARNEY                 39.37N 94.37W
08/21/2017                   CLAY               MO   EMERGENCY MNGR

            WATER OVER ROADWAY IN SEVERAL LOCATIONS IN
            KEARNEY AREA AND ALONG 92 HWY. CURRENTLY
            PASSABLE.

&&

STG

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
334 PM CDT MON AUG 21 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0325 PM     FLOOD            PLEASANT VALLEY         39.22N 94.48W
08/21/2017                   CLAY               MO   LAW ENFORCEMENT

            WATER OVER ROADWAY.

&&

STG

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
334 PM CDT MON AUG 21 2017

MOZ029-037-212100-
Jackson MO-Clay MO-
334 PM CDT MON AUG 21 2017

...SIGNIFICANT WEATHER ADVISORY FOR CLAY AND NORTHWESTERN JACKSON
COUNTIES UNTIL 400 PM CDT...

At 334 PM CDT, Doppler radar was tracking a strong thunderstorm near
Pleasant Valley, or near Claycomo, moving northeast at 30 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Kansas City, Liberty, Gladstone, Excelsior Springs, Kearney, North
Kansas City, Sugar Creek, Lawson, Claycomo, Pleasant Valley,
Glenaire, Avondale, Oakview, Missouri City, River Bend, Mosby,
Oakwood Park, Oakwood, Birmingham and Oaks.

This includes the following highways...
 Interstate 35 in Missouri between mile markers 6 and 30.
 Interstate 29 between mile markers 0 and 2.
 Interstate 435 between mile markers 40 and 55.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3946 9427 3945 9422 3921 9421 3913 9458
      3928 9461 3931 9460
TIME...MOT...LOC 2034Z 239DEG 27KT 3926 9450

CDB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
339 PM CDT MON AUG 21 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0336 PM     HEAVY RAIN       2 NE LAKE WAUKOMIS      39.25N 94.62W
08/21/2017  E2.70 INCH       PLATTE             MO   PUBLIC

            TOTAL SO FAR TODAY.

&&

STG

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
341 PM CDT MON AUG 21 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0326 PM     HEAVY RAIN       4 N OAKVIEW             39.26N 94.58W
08/21/2017  E3.50 INCH       CLAY               MO   PUBLIC

            TOTAL SO FAR TODAY.

&&

STG

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
345 PM CDT MON AUG 21 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0931 AM     TSTM WND DMG     1 SW LEE'S SUMMIT       38.90N 94.40W
08/21/2017                   JACKSON            MO   NWS EMPLOYEE

            A COUPLE OF BRANCHES FELL OVER CROSSING
            DRIVE. THEY WERE ABOUT 6-8 INCHES IN
            DIAMETER.

&&

STG